That depends on which mode you play.GraksmxxT is elo banned and has a huge penalty in DT,so he is only effective is survivor extended and DM.On the other hand,Charlie is equally effective in every modes.
But considering GraksmxxT is a 4*,and has a power more,with a better clan bonus than Charlie,GraksmxxT is definitely better than Charlie individually IMO.

Not really just trying to get good pieces for corner stones of possible decks. i know that i want both of them but right now i can only afford one and was trying to figure out which is the best to get first... i have a few pussycats and was thinking about getting Charlie and trying to see how that went but still unsure...